package com.tanhua.sso.service.impl;

import cn.hutool.core.util.ObjectUtil;
import com.alibaba.dubbo.config.annotation.Reference;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.tanhua.common.mapper.UserMapper;
import com.tanhua.common.pojo.User;
import com.tanhua.dubbo.server.api.HuanXinApi;
import com.tanhua.sso.service.UserService;
import io.jsonwebtoken.ExpiredJwtException;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.messaging.MessagingException;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private RedisTemplate<String,String> redisTemplate;
    @Value("${jwt.secret}")
    private String secret;
    @Autowired
    private RocketMQTemplate rocketMQTemplate;

    @Reference(version = "1.0.0")
    private HuanXinApi huanXinApi;
    @Override
    public String login(String phone, String code) {
        String redisKey = "CHECK_CODE_" + phone;
        boolean isNew = false;
        String redisValue = this.redisTemplate.opsForValue().get(redisKey);
        if (!StringUtils.equals(code,redisValue)) {
            //验证码错误
            return null;
        }
        this.redisTemplate.delete(redisKey);
        QueryWrapper<User> wrapper=new QueryWrapper<>();
        wrapper.eq("mobile", phone);
        User user = userMapper.selectOne(wrapper);
        if(null==user){
            user=new User();
            user.setMobile(phone);
            user.setPassword(DigestUtils.md5Hex("123456"));
            this.userMapper.insert(user);
            isNew=true;

            Boolean register = this.huanXinApi.register(user.getId());
            if (!register){
                log.error("注册环信用户失败~ userId = " + user.getId());
            }
        }

        //生成token
        Map<String, Object> claims = new HashMap<String, Object>();
        claims.put("id", user.getId());

        // 生成token
        String token = Jwts.builder()
                .setClaims(claims) //payload，存放数据的位置，不能放置敏感数据，如：密码等
                .signWith(SignatureAlgorithm.HS256, secret) //设置加密方法和加密盐
                .setExpiration(new DateTime().plusHours(12).toDate()) //设置过期时间，12小时后过期
                .compact();
        try {
            //发送用户登录成功的消息
            Map<String,Object> msg = new HashMap<>();
            msg.put("id", user.getId());
            msg.put("date", System.currentTimeMillis());

            this.rocketMQTemplate.convertAndSend("tanhua-sso-login", msg);
        } catch (MessagingException e) {
            log.error("发送消息失败！", e);
        }

        return token + "|" + isNew;
    }

    /**
     * 校验token是否合法
     * @param token
     * @return
     */
    @Override
    public User queryUserByToken(String token) {

        //解析数据
        Map<String,Object> body = Jwts.parser()
                .setSigningKey(secret)
                .parseClaimsJws(token)
                .getBody();
        User user=new User();
        user.setId(Long.valueOf(body.get("id").toString()));
        //需要返回user对象中的mobile，需要查询数据库获取到mobile数据
        //如果每次都查询数据库，必然会导致性能问题，需要对用户的手机号进行缓存操作
        //数据缓存时，需要设置过期时间，过期时间要与token的时间一致
        //如果用户修改了手机号，需要同步修改redis中的数据
        //将查询出来的用户保存redis
        try {
            String redisKey="TANHUA_USER_MOBILE_"+user.getId();
            if (this.redisTemplate.hasKey(redisKey)) {
                String mobile = this.redisTemplate.opsForValue().get(redisKey);
                user.setMobile(mobile);
            }else {
                User user1 = userMapper.selectById(user.getId());
                user.setMobile(user1.getMobile());
                //将手机号写入到redis中
                //在jwt中的过期时间的单位为：秒
               /* System.out.println("过期时间为:"+Long.valueOf(body.get("exp").toString()));
                System.out.println("现在时间:"+System.currentTimeMillis());*/
                long timeout = Long.valueOf(body.get("exp").toString()) * 1000 - System.currentTimeMillis();
                this.redisTemplate.opsForValue().set(redisKey,user1.getMobile(),
                        timeout,TimeUnit.MILLISECONDS);
            }
            return user;
        } catch (ExpiredJwtException e) {
            log.info("token已过期!token="+token);
        }catch (Exception e){
            log.error("token不合法,token="+token,e);
        }
        return  null;
    }



    @Override
    public Boolean updatePhone(Long userId, String newPhone) {
        QueryWrapper<User> wrapper=new QueryWrapper<>();
        wrapper.eq("mobile", newPhone);
        User user = this.userMapper.selectOne(wrapper);
        if(ObjectUtil.isNotEmpty(user)){
            //新手机号已经被注册
            return false;
        }
        user=new User();
        user.setMobile(newPhone);
        user.setId(userId);

        return this.userMapper.updateById(user) > 0;
    }
}
